Lorain County is a county in the northeastern part of the U.S. state of Ohio. As of the 2020 census, the population was 312,964. Its county seat is Elyria. The county was physically established in 1822, becoming judicially independent in 1824. Lorain County is part of the Cleveland-Elyria, OH Metropolitan Statistical Area. The county is home to Oberlin College.
Lorain County was established in 1822 from portions of several of its adjacent counties. This county became judicially-independent in 1824. The original proposed name for the county was "Colerain". The final name "Lorain" was chosen by Heman Ely, who had previously founded and named the city of Elyria. The county's name was based on the French province of Lorraine.
According to the United States Census Bureau, the county has an area of 923 square miles (2,390km2), of which 491 square miles (1,270km2) is land and 432 square miles (1,120km2) (47%) is water. It is Ohio's fourth-largest county by area.
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